NL2022923B1 - A lighting unit - Google Patents

A lighting unit Download PDF

Info

Publication number
NL2022923B1
NL2022923B1 NL2022923A NL2022923A NL2022923B1 NL 2022923 B1 NL2022923 B1 NL 2022923B1 NL 2022923 A NL2022923 A NL 2022923A NL 2022923 A NL2022923 A NL 2022923A NL 2022923 B1 NL2022923 B1 NL 2022923B1
Authority
NL
Netherlands
Prior art keywords
optic
unit according
light
illumination unit
light sources
Prior art date
Application number
NL2022923A
Other languages
Dutch (nl)
Inventor
Frederik Jozef Huysmans Gert
Marc Nik De Ketelaere Ward
Original Assignee
Etap Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Etap Nv filed Critical Etap Nv
Priority to NL2022923A priority Critical patent/NL2022923B1/en
Application granted granted Critical
Publication of NL2022923B1 publication Critical patent/NL2022923B1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/008—Combination of two or more successive refractors along an optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The invention relates to a lighting unit generating a light beam having a mainly uniform luminance, in substantially each given viewing direction. The lighting unit comprises a carrier having a support structure extending in a length direction and a multiple number of light sources mounted on said support structure as a series of light sources arranged in a linear array along the length direction. Further, the lighting unit comprises a multiple number of first optics, each first optic being associated with at least one corresponding light source for beam shaping light emanating from the at least one light source in the length direction. Also, the lighting unit comprises a second optic for directing the beam shaped light downwardly, and a third optic for beam shaping the downwardly directed beam in a width direction, transverse to the length direction. Fig. 1

Description

P122821NL00 Title: A lighting unit The invention relates to a lighting unit.
In modern lighting units, LED's and laser-based light sources can be used as a light source. Then, light generated by a LED or laser propagates through the refractive optical element such as a total internal reflection, TIR, lens or a freeform lens for illuminating a structure to be illuminated.
It appears, in practice, that the design of suitable refractive optical elements 1s no sinecure. As an example, due to the point source behaviour of LED's, the luminance of lighting units can be relatively high and strongly dependent on a viewing angle towards the lighting unit, thus causing dazzling experience to persons who move through a space that is illuminated by the lighting unit.
It appears to be problematic to reduce the luminance of a lens. In fact, by enlarging a lens, the source image does not become larger. Further, when adding texture on a lens surface the control over a desired beam pattern is lost. Also, when using Fresnel lenses or a combination of discontinuous lenses rounding’s in injection moulded parts will be introduced, which result in stray light which results in a lower quality of the beamshaping performance of the lighting unit.
It is an object of the present invention to provide a lighting unit having a mainly uniform luminance of an optic from which light emanates outwardly from the lighting unit, in substantially each given viewing direction. Thereto, according to an aspect of the invention, a lighting unit is provided, the lighting comprising a carrier having a support structure extending in a length direction, a multiple number of light sources mounted on said support structure as a series of light sources arranged in a linear array along the length direction,
a multiple number of first optics, each first optic being associated with at least one corresponding light source for beam shaping light emanating from the at least one light source in the length direction, a second optic for directing the beam shaped light downwardly, and a third optic for beam shaping the downwardly directed beam in a width direction, transverse to the length direction.
By beam shaping light in a length direction, using the first optics, and by subsequently shaping a downwardly directed beam in a width direction, using the third optic, a mainly uniform luminance of the light emanating from the third optic can be obtained, even if the light sources have small dimensions such as LEDs. Then, light emanating from the lighting unit can be designed to have a mainly uniform luminance, in substantially each given viewing direction.
Further advantageous embodiments according to the invention are described in the following claims.
It should be noted that the technical features described above or below may each on its own be embodied in a lighting unit, i.e. isolated from the context in which it is described, separate from other features, or in combination with only a number of the other features described in the context in which it is disclosed. Each of these features may further be combined with any other feature disclosed, in any combination.
The invention will now be further elucidated on the basis of a number of exemplary embodiments and an accompanying drawing. In the drawing: Figure 1 shows a schematic perspective view of a lighting unit according an embodiment of the invention; Figure 2 shows a schematic perspective partial view of the lighting unit shown in Fig. 1; Figure 3 shows a schematic cross sectional view of the lighting unit shown in Fig. 1;
Figure 4 shows a schematic cross sectional view of a lighting unit according to another embodiment of the invention, and Figure 5 shows a schematic cross sectional view of a lighting unit according to yet another embodiment of the invention.
It is noted that the figures show merely preferred embodiments according to the invention. In the figures, the same reference numbers refer to equal or corresponding parts.
Figure 1 shows a schematic perspective view of a lighting unit 1 according to an embodiment of the invention.
The lighting unit 1 can be used for lighting purposes in various types of buildings including hospitals, doctor’s offices, dentist’s offices, elderly homes, offices, schools, crèches, nursery schools, day care centers, etc. Further, the lighting unit can be implemented as surgical Lighting, examination lighting or torch, or as an industrial luminaire such as industrial line luminaire, outdoor luminaire, parking area luminaire, vehicle luminaire e.g. in a bus, airplane, metro etc., or tunnel lighting luminaire.
In the embodiment shown in Fig. 1, the lighting unit 1 includes a carrier 2 having a support structure 3 extending in a length direction L. In the shown embodiment, the support structure 3 is implemented as a substantially plate-shaped support element 3 that is oriented in a mainly vertical plane. The carrier 2 can be affixed to a structure in a room or building, e.g. a wall or ceiling of a room. The lighting unit 1 further includes a multiple number of light sources 4 mounted on the support structure 3 of the carrier 2 as a series of light sources 4 arranged in a linear array along the length direction L. Preferably, the light sources 4 are implemented as LEDs. However, in principle, the light sources 4 can also be implemented as other small size light sources. The lighting unit 1 also includes a multiple number of first optics 5, as well as a second optic 6 and a third optic 7.
Each first optic 5 of the multiple number of first optics 5 is associated with at least one corresponding light source 4. As an example, as shown, each first optic 5 is associated with a single corresponding light source 4. However, a first optic 5 might be associated with a series of corresponding light sources 4, e.g. two, three, four or more light sources 4. Then, individual light sources of the series of light sources may have different spectra. As an example, a first light source may include more blue Light while a second light source may include more red light. Optionally, the Light sources in the series of light sources can be individually switched on and off and/or may be individually tunable, e.g. for the purpose of providing human centric lighting such as warm white or blue white. Also in the shown embodiment wherein each first optic 5 is associated with a single corresponding light source 4, the respective light sources 4 may have mutually different spectra. In the shown embodiment, the first optics 5 are integrated with the corresponding at least one light source 4. However, alternatively, the first optics 5 can be arranged separately from the corresponding at least one light source 4.
The first optics 5 are arranged for beam shaping light that emanates from the corresponding at least one light sources 4, such that the light is beam shaped in the length direction L of the carrier 2. The second optic 6 and the third optic 7 preferably do not change the cut off angle in the length direction L generated by the first optics 5. The first optics 5 are preferably implemented as refractive elements such as freeform lenses or total internal reflection TIR lenses.
Figure 2 shows a schematic perspective partial view of the lighting unit 1 shown in Fig. 1. Here, the first optics 5 are arranged for collimating the light emanating from the corresponding light source 4 crosswise, i.e. mainly in a width direction W on the third optic 7, away from the support structure 3 and transverse to the length direction L of the carrier 2. Advantageously, in a vertical plane, a beam angle c of the beam
B1 propagating from the first optics 5 is selected in combination with characteristics of the second optic 6 so as to generate a mainly uniform illuminance in the width direction W on the third optic 7as discussed in more detail below.
5 As shown in Fig. 2, the light propagating from the first optic 5 is also beam shaped in the length direction L of the carrier 2. After reflection against the second optic 6, the beam B2 has a beam angle a, in the vertical plane, such that beams B2 generated by neighboring light sources 4 overlap each other in the length direction L thereby providing a mainly uniform illuminance in the length direction L on the third optic 7. Optionally, the first optics 5 may have a diffusing texture in the length direction L, thereby further improving the mainly uniform illuminance performance of the Lighting unit 1 in the length direction L. In Fig. 2, cross sectional views of the beam B2 are shown, after reflection with the second optic 6 having beam angle a between boundary ray pairs rl, 12; 13, r4; r5, r6.
The second optic 6 is arranged for directing the beam shaped Light B1 propagating from the first optics 5 as a redirected beam B2 in a downward direction, opposite to an upward or height direction H. Further, the third optic 7 is arranged for shaping the downwardly directed beam B2 in the width direction W, as described in more detail below.
In the shown embodiment, the second optic 6 is mainly invariant in the length direction L so as to maintain the mainly uniform illuminance performance of the lighting unit 1 in the length direction. As shown, the second optic 6 is a reflector having a reflective surface. Preferably, the reflective surface has, in a cross section in the width direction W, a parabolic or hyperbolic geometry. In principle, the second optic 6 can be implemented as a refractive element, as an alternative to the reflector shown in Fig. 2. The reflector 6 in the shown embodiment generally extends from an upper edge of the carrier 2 in the width direction W downwardly so as to intercept the light beam B1 propagating form the first optics 5 and redirected said light beam B1 as a mainly downwardly oriented beam B2 towards the third optic 7. In the shown embodiment, the third optic 7 is a mainly flat element extending mainly horizontally below the second optic 6. Figure 3 shows a schematic cross sectional view of the lighting unit 1 shown in Fig. 1. According to design parameters of the lighting unit, including opening angle c of the beam B1 propagating from the first optics 5, the geometry of the second optic 6 and the relative position the second optic 6 relative to the first optics 5, light rays rl, £3, r5 propagating from the second optic 6 to the third optic 7 do not cross or overlap. Then, as shown in Fig. 3, a continuous crosswise ray fan can be realized reaching the third optic 7 so as to prevent discontinuities in the luminance on the third optic 7.
By applying the second optic 6, a virtual focal point VFP having a height H2 that is much higher than the height H1 of the lighting unit is obtained.
Advantageously, the third optic 7 is implemented as a refractive element, preferably including a concatenation of freeform lenses that are adapted to generate a crosswise light distribution b, i.e. in the width direction W, that is mainly identical to the left and the right for generating a beam B2 having a mainly uniform luminance of the third optic 7 in the width direction W. Preferably, each individual freeform lens is designed to give the same or similar crosswise light beam or distribution B3, 1.e. in the width direction W, mainly independently of the incident angle of the light (rl, ¥3, 15), depending on the width position of the individual lens in the third optic 3. Then, a freeform lens 7c near a width end of the third optic 3 generally has a different surface shape compared to a freeform lens 7d located in the middle of the third optic 3, when seen in the width direction W.
Preferably, the freeform lenses are curved on a side 7a facing towards the second optic 6 and wherein the freeform lenses are flat on a side 7b facing away from the second optic 6 for the purpose of easy cleaning.
Further, the third optic 7 may have a randomly roughened surface to improve the mainly uniform luminance of the third optic 7 in substantially each given viewing direction. Also, the third optic 7 may, 1n 1ts material, randomly scattering elements, for improving the mainly uniform luminance. It 1s noted that the substantially plate-shaped support element 3 can be oriented in a mainly vertical plane as shown in Fig. 1-3 or in another plane.
Figure 4 shows a schematic cross sectional view of a lighting unit 1 according to another embodiment of the invention. Here, the substantially plate-shaped support element 3 is slightly tilted in a clockwise direction. The second optic 6 is shaped, sized and positioned such that light beams or rays do not cross or overlap but propagate as a continuous crosswise ray fan towards the third optic 7 so as to prevent discontinuities in the luminance on the third optic 7.
Figure 5 shows a schematic cross sectional view of a lighting unit 1 according to yet another embodiment of the invention. Here, the substantially plate-shaped support element 3 is slightly further tiled in the clockwise direction until the plate-shaped support element 3 is oriented mainly horizontal. Further, the first optics 5 have been designed to generate a tilted output beam B1 emanating from the first optics 5 similar to the embodiment shown in Fig. 4.
It is further noted that the support structure 3 can be implemented as a substantially plate-shaped support element 3 as shown in Fig. 1-5 or as another element or unit, e.g. a box-shaped unit.
The invention 1s not restricted to the embodiments described above. It will be understood that many variants are possible.
These and other embodiments will be apparent for the person skilled in the art and are considered to fall within the scope of the invention as defined in the following claims. For the purpose of clarity and a concise description features are described herein as part of the same or separate embodiments.
However, it will be appreciated that the scope of the invention may include embodiments having combinations of all or some of the features described.

Claims (17)

ConclusiesConclusions 1. Verlichtingseenheid, omvattende: - een drager met een ondersteuningsstructuur die zich witstrekt in een lengterichting; - een meervoudig aantal lichtbronnen bevestigd aan genoemde ondersteuningsstructuur als een serie van lichtbronnen die zijn opgesteld in een lineaire rij langs de lengterichting; - een meervoudig aantal eerste optieken, waarbij elke eerste optiek geassocieerd is met ten minste een corresponderende lichtbron voor het bundelvormen van licht dat uitstraalt vanaf de ten minste ene lichtbron in de lengterichting; - een tweede optiek voor het neerwaarts richten van het bundelvormige licht, en - een derde optiek voor het bundelvormen van het neerwaarts gerichte licht in een breedterichting, dwars op de lengterichting.Lighting unit, comprising: - a support with a support structure that stretches in a longitudinal direction; - a plurality of light sources attached to said support structure as a series of light sources arranged in a linear row along the longitudinal direction; a plurality of first optics, each first optic being associated with at least one corresponding light source for beamforming light radiating from the at least one longitudinal light source; - a second optic for directing the beam-shaped light downward, and - a third optic for beamforming the downward-directed light in a width direction, transverse to the longitudinal direction. 2. Verlichtingseenheid volgens conclusie 1, waarbij de eerste optieken refractieve elementen zijn.Illumination unit according to claim 1, wherein the first optics are refractive elements. 3. Verlichtingseenheid volgens conclusie 2, waarbij het refractieve element een vrije vorm lens of een TIR lens is.Illumination unit according to claim 2, wherein the refractive element is a free-form lens or a TIR lens. 4. Verlichtingseenheid volgens één van de voorgaande conclusies, waarbij de eerste optieken een verstrooiende textuur hebben in de lengterichting.Illumination unit according to any of the preceding claims, wherein the first optics have a diffusing texture in the longitudinal direction. 5. Verlichtingseenheid volgens één van de voorgaande conclusies, waarbij de lichtbronnen LEDs zijn.Lighting unit according to any one of the preceding claims, wherein the light sources are LEDs. 6. Verlichtingseenheid volgens één van de voorgaande conclusies, waarbij de eerste optiek is geïntegreerd met de corresponderende ten minste ene lichtbron.Lighting unit according to one of the preceding claims, wherein the first optic is integrated with the corresponding at least one light source. 7. Verlichtingseenheid volgens één van de voorgaande conclusies, waarbij een eerste optiek is geassocieerd met een reeks lichtbronnen, waarbij individuele lichtbronnen van de reeks lichtbronnen verschillende spectra hebben.Illumination unit according to any of the preceding claims, wherein a first optic is associated with an array of light sources, individual light sources of the array of light sources having different spectra. 8. Verlichtingseenheid volgens conclusie 7, waarbij individuele lichtbronnen in de reeks lichtbronnen aanpasbaar zijn.Lighting unit according to claim 7, wherein individual light sources in the series of light sources are adjustable. 9. Verlichtingseenheid volgens één van de voorgaande conclusies, waarbij de tweede optiek hoofdzakelijk invariant is in de lengterichting.Illumination unit according to any of the preceding claims, wherein the second optic is substantially invariant in the longitudinal direction. 10. Verlichtingseenheid volgens één van de voorgaande conclusies, waarbij lichtstralen die zich voorplanten vanaf de tweede optiek naar de derde optiek niet overlappen in de breedterichting.Illumination unit according to any of the preceding claims, wherein light rays propagating from the second optic to the third optic do not overlap in the width direction. 11. Verlichtingseenheid volgens één van de voorgaande conclusies, waarbij de tweede optiek een reflector is, bij voorkeur met een in dwarsdoorsnede parabolisch of hyperbolisch reflectief oppervlak.Illumination unit according to one of the preceding claims, wherein the second optic is a reflector, preferably with a cross-sectional parabolic or hyperbolic reflective surface. 12. Verlichtingseenheid volgens één van de voorgaande conclusies, waarbij de derde optiek een refractief element is.Illumination unit according to any of the preceding claims, wherein the third optic is a refractive element. 13. Verlichtingseenheid volgens conclusie 12, waarbij het brekende element een concatenatie van vrije vorm lenzen omvat.Illumination unit according to claim 12, wherein the refractive element comprises a concatenation of free-form lenses. 14. Verlichtingseenheid volgens conclusie 13, waarbij elke individuele vrije vorm lens een gelijke of vergelijkbare bundelhoek genereert in hoofdzaak onafhankelijk van de invallende hoek van het licht.Illumination unit according to claim 13, wherein each individual free-form lens generates an equal or comparable beam angle substantially independent of the incident angle of the light. 15. Verlichtingseenheid volgens conclusie 13, waarbij de vrije vorm lenzen zijn gebogen aan een zijde die is gekeerd naar de tweede optiek toe en waarbij de vrije vorm lezen vlak zijn aan een zijde die is afgekeerd van de tweede optiek.The illumination unit of claim 13, wherein the free-form lenses are curved on a side facing the second optic and wherein the free-form readings are planar on a side remote from the second optic. 16. Verlichtingseenheid volgens één van de voorgaande conclusies, waarbij de derde optiek een willekeurig geruwd oppervlak heeft.Illumination unit according to one of the preceding claims, wherein the third optic has a random roughened surface. 17. Verlichtingseenheid volgens één van de voorgaande conclusies, waarbij de derde optiek willekeurige verstrooi-elementen omvat.Illumination unit according to one of the preceding claims, wherein the third optic comprises random scattering elements.
NL2022923A 2019-04-11 2019-04-11 A lighting unit NL2022923B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL2022923A NL2022923B1 (en) 2019-04-11 2019-04-11 A lighting unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2022923A NL2022923B1 (en) 2019-04-11 2019-04-11 A lighting unit

Publications (1)

Publication Number Publication Date
NL2022923B1 true NL2022923B1 (en) 2020-10-20

Family

ID=67262979

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2022923A NL2022923B1 (en) 2019-04-11 2019-04-11 A lighting unit

Country Status (1)

Country Link
NL (1) NL2022923B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071930A1 (en) * 1999-05-20 2000-11-30 Koninklijke Philips Electronics N.V. Luminaire with leds
EP1298939A2 (en) * 2001-09-29 2003-04-02 Samsung Electronics Co., Ltd. Illumination system and projector adopting the same
US20060203486A1 (en) * 2005-03-08 2006-09-14 Samsung Electronics Co., Ltd. Illuminating unit and projection type image display apparatus using the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071930A1 (en) * 1999-05-20 2000-11-30 Koninklijke Philips Electronics N.V. Luminaire with leds
EP1298939A2 (en) * 2001-09-29 2003-04-02 Samsung Electronics Co., Ltd. Illumination system and projector adopting the same
US20060203486A1 (en) * 2005-03-08 2006-09-14 Samsung Electronics Co., Ltd. Illuminating unit and projection type image display apparatus using the same

Similar Documents

Publication Publication Date Title
JP6181326B2 (en) Light source and solar imitation lighting system
JP6839648B2 (en) Vehicle lighting module
US20120320588A1 (en) Edge-lit light panel having a downlight within a lined indentation in the panel
CN108139062B (en) Illumination system and method of generating a light output
US20220163186A1 (en) Direct-light generator for sun-sky-imitating illumination devices
US9022606B2 (en) Virtual surface indirect radiating luminaire
USRE48873E1 (en) Asymmetric linear LED luminaire design for uniform illuminance and color
JP6706183B2 (en) Optical element
WO2019210709A1 (en) Light fixture
JP5814271B2 (en) Lighting equipment and louvers
US20160097511A1 (en) Light source for uniform illumination of a surface
EP2629136A1 (en) Using micro optical elements for depth perception in luminescent figurative structures illuminated by point sources
NL2022923B1 (en) A lighting unit
EP2924348A1 (en) Lighting apparatus
US20090231855A1 (en) Uniform wash lighting fixture and lens
USRE33593E (en) Luminaire for indirect lighting
JP2016530668A (en) Lighting unit
NL2019706B1 (en) A lighting unit
USRE33471E (en) Method for indirect lighting
RU188259U1 (en) SURGICAL LED LAMP
JP7194692B2 (en) Light output system and lighting unit comprising same
US9134004B2 (en) Lighting system for art works
KR20210069935A (en) Led lighting system for resolving shading zone and led lighting device used therefor
US9528683B2 (en) Shaped indirect luminaire
JP7393771B1 (en) Light diffusion mechanism and lighting device equipped with this light diffusion mechanism

Legal Events

Date Code Title Description
HC Change of name(s) of proprietor(s)

Owner name: ETAP LIGHTING INTERNATIONAL NV; BE

Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), CHANGE OF OWNER(S) NAME; FORMER OWNER NAME: ETAP N.V.

Effective date: 20220825